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TRAMISUBOO - Two-Meter Radio Mini Survey (T-RaMiSu) of the Bootes Field

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Overview

This table contains results from wide-area, deep, high-resolution 153-MHz GMRT observations of the NOAO Bootes field, adding to the extensive, multi-wavelength data of this region. The observations, data reduction, and catalog construction and description are described in the reference paper. The seven pointings (listed in Table 2 of the reference paper) produced a final mosaic covering 30 square degrees with a resolution of 25". The rms noise is 2 mJy/beam in the center of the image, rising to 4-5 mJy/beam at the edges, with an average of 3 mJy/beam. Seventy-five per cent of the area has an rms < 4 mJy/beam. The extracted source catalog contains 1289 sources detected at 5 sigma at flux densities between 4.1 mJy and 7.3 Jy, of which 453 are resolved. The authors estimate the catalogue to be 92% reliable and 95% complete at an integrated flux density limit of 14 mJy. The flux densities and astrometry have been corrected for systematic errors. In their paper, the authors calculate the differential source counts which are in good agreement with those in the literature and provide an important step forward in quantifying the source counts at these low frequencies and low flux densities. The GMRT 153-MHz sources have been matched to the 1.4-GHz NVSS and 327-MHz WENSS catalogs and spectral indices were derived.

The source catalog presented here is derived from seven 4 hour pointings with the GMRT at 153 MHz, centered on the NOAO Bootes field. The resulting 30 square degree image has a central noise level of 2 mJy/beam and a resolution of 25". This table contains entries for all 1289 detected 153-MHz radio sources as well as for the 160 Gaussian components of the 77 sources (71 doubles and 3 triples) which could be fit by multiple Gaussian components, making a total of 1449 entries.


Catalog Bibcode

2013A&A...549A..55W

References

T-RaMiSu: The Two-meter Radio Mini Survey I. The Bootes Field.
    Williams W.L., Intema H.T., Rottgering H.J.A.
    <Astron. Astrophys. 549, A55 (2013)>
    =2013A&A...549A..55W        (SIMBAD/NED BibCode)

Provenance

This table was created by the HEASARC in January 2013 based on the CDS Catalog J/A+A/549/A55 files table2.dat and table3.dat.

Parameters

Name
The name for the GMRT 153-MHz radio source. This was created by the HEASARC using the '[WIR2013]' prefix (for Williams, Intema, Rottgering 2013) the J2000.0 equatorial coordinates and the component identifier (if any), in the style that we expect will be recommended by the Dictionary of Nomenclature of Celestial Objects, e.g., '[WIR2013] JHHMMSS+DDMMa'. Thus, for double sources, there are 3 entries corresponding to one for the entire source, and two for the two components, e.g., '[WIR2013] J144617+3506', '[WIR2013] J144617+3506a' and '[WIR2013] J144617+3506b'.

Component
This parameter identifies the component for multiple-Gaussian sources, e.g., 'a', 'b', or 'c'.

RA
The flux-weighted Right Ascension of the 153-MHz radio source in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10-5 degrees in the original table.

RA_Error
The uncertainty in the flux-weighted Right Ascension of the 153-MHz radio source, in arcseconds.

Dec
The flux-weighted Declination of the 153-MHz radio source in the selected equinox. This was given in J2000.0 decimal degrees to a precision of 10-5 degrees in the original table.

Dec_Error
The uncertainty in the flux-weighted Declination of the 153-MHz radio source, in arcseconds.

LII
The Galactic Longitude of the 153-MHz radio source.

BII
The Galactic Latitude of the 153-MHz radio source.

Int_Flux_153_MHz
The integrated flux density of the 153-MHz radio source, in mJy.

Int_Flux_153_MHz_Error
The uncertainty in the integrated flux density of the 153-MHz radio source, in mJy.

Flux_153_MHz
The peak flux density of the 153-MHz radio source, in mJy/beam.

Flux_153_MHz_Error
The uncertainty in the peak flux density of the 153-MHz radio source, in mJy/beam.

RMS_153_MHz
The local RMS noise in the 153-MHz image near the source, in mJy/beam.

Num_Gaussians
The number of Gaussians fitted to the 153-MHz radio source. For point sources, this is 1, whereas for extended sources for which Gaussian components could be successfully fit, this is 2 (71 such sources) or 3 (6 such sources). For extended sources for which the Gaussian fits were poor, this number is left as null.

Semi_Major_Axis
For extended 153-MHz radio sources for which the Gaussian components could be successfully fit, the deconvolved semi-major axis of the indicated Gaussian component, in arcseconds.

Semi_Major_Axis_Error
The uncertainty in the deconvolved semi-major axis of the indicated Gaussian component, in arcseconds.

Semi_Minor_Axis
For extended 153-MHz radio sources for which the Gaussian components could be successfully fit, the deconvolved semi-minor axis of the indicated Gaussian component, in arcseconds. For sources which were resolved in only one direction, this is left blank.

Semi_Minor_Axis_Error
The uncertainty in the deconvolved semi-minor axis of the indicated Gaussian component, in arcseconds.

Position_Angle
For extended 153-MHz radio sources for which the Gaussian components could be successfully fit, the deconvolved position angle of the indicated Gaussian component, in degrees.

Position_Angle_Error
The uncertainty in the deconvolved position angle of the indicated Gaussian component, in degrees.


Contact Person

Questions regarding the TRAMISUBOO database table can be addressed to the HEASARC User Hotline.

Page Author: Browse Software Development Team
Last Modified: 15-Jan-2013